1 /* 2 * Copyright (c) 2000 Ben Smithurst <ben@scientia.demon.co.uk> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 /* \summary: BSD time daemon protocol printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <netdissect-stdinc.h> 29 30 #include "netdissect.h" 31 #include "extract.h" 32 33 /* 34 * Time Synchronization Protocol 35 * 36 * http://docs.freebsd.org/44doc/smm/12.timed/paper.pdf 37 */ 38 39 struct tsp_timeval { 40 uint32_t tv_sec; 41 uint32_t tv_usec; 42 }; 43 44 struct tsp { 45 uint8_t tsp_type; 46 uint8_t tsp_vers; 47 uint16_t tsp_seq; 48 union { 49 struct tsp_timeval tspu_time; 50 int8_t tspu_hopcnt; 51 } tsp_u; 52 int8_t tsp_name[256]; 53 }; 54 55 #define tsp_time tsp_u.tspu_time 56 #define tsp_hopcnt tsp_u.tspu_hopcnt 57 58 /* 59 * Command types. 60 */ 61 #define TSP_ANY 0 /* match any types */ 62 #define TSP_ADJTIME 1 /* send adjtime */ 63 #define TSP_ACK 2 /* generic acknowledgement */ 64 #define TSP_MASTERREQ 3 /* ask for master's name */ 65 #define TSP_MASTERACK 4 /* acknowledge master request */ 66 #define TSP_SETTIME 5 /* send network time */ 67 #define TSP_MASTERUP 6 /* inform slaves that master is up */ 68 #define TSP_SLAVEUP 7 /* slave is up but not polled */ 69 #define TSP_ELECTION 8 /* advance candidature for master */ 70 #define TSP_ACCEPT 9 /* support candidature of master */ 71 #define TSP_REFUSE 10 /* reject candidature of master */ 72 #define TSP_CONFLICT 11 /* two or more masters present */ 73 #define TSP_RESOLVE 12 /* masters' conflict resolution */ 74 #define TSP_QUIT 13 /* reject candidature if master is up */ 75 #define TSP_DATE 14 /* reset the time (date command) */ 76 #define TSP_DATEREQ 15 /* remote request to reset the time */ 77 #define TSP_DATEACK 16 /* acknowledge time setting */ 78 #define TSP_TRACEON 17 /* turn tracing on */ 79 #define TSP_TRACEOFF 18 /* turn tracing off */ 80 #define TSP_MSITE 19 /* find out master's site */ 81 #define TSP_MSITEREQ 20 /* remote master's site request */ 82 #define TSP_TEST 21 /* for testing election algo */ 83 #define TSP_SETDATE 22 /* New from date command */ 84 #define TSP_SETDATEREQ 23 /* New remote for above */ 85 #define TSP_LOOP 24 /* loop detection packet */ 86 87 #define TSPTYPENUMBER 25 88 89 static const char tstr[] = "[|timed]"; 90 91 static const char *tsptype[TSPTYPENUMBER] = 92 { "ANY", "ADJTIME", "ACK", "MASTERREQ", "MASTERACK", "SETTIME", "MASTERUP", 93 "SLAVEUP", "ELECTION", "ACCEPT", "REFUSE", "CONFLICT", "RESOLVE", "QUIT", 94 "DATE", "DATEREQ", "DATEACK", "TRACEON", "TRACEOFF", "MSITE", "MSITEREQ", 95 "TEST", "SETDATE", "SETDATEREQ", "LOOP" }; 96 97 void 98 timed_print(netdissect_options *ndo, 99 register const u_char *bp) 100 { 101 const struct tsp *tsp = (const struct tsp *)bp; 102 long sec, usec; 103 104 ND_TCHECK(tsp->tsp_type); 105 if (tsp->tsp_type < TSPTYPENUMBER) 106 ND_PRINT((ndo, "TSP_%s", tsptype[tsp->tsp_type])); 107 else 108 ND_PRINT((ndo, "(tsp_type %#x)", tsp->tsp_type)); 109 110 ND_TCHECK(tsp->tsp_vers); 111 ND_PRINT((ndo, " vers %u", tsp->tsp_vers)); 112 113 ND_TCHECK(tsp->tsp_seq); 114 ND_PRINT((ndo, " seq %u", tsp->tsp_seq)); 115 116 switch (tsp->tsp_type) { 117 case TSP_LOOP: 118 ND_TCHECK(tsp->tsp_hopcnt); 119 ND_PRINT((ndo, " hopcnt %u", tsp->tsp_hopcnt)); 120 break; 121 case TSP_SETTIME: 122 case TSP_ADJTIME: 123 case TSP_SETDATE: 124 case TSP_SETDATEREQ: 125 ND_TCHECK(tsp->tsp_time); 126 sec = EXTRACT_32BITS(&tsp->tsp_time.tv_sec); 127 usec = EXTRACT_32BITS(&tsp->tsp_time.tv_usec); 128 /* XXX The comparison below is always false? */ 129 if (usec < 0) 130 /* invalid, skip the rest of the packet */ 131 return; 132 ND_PRINT((ndo, " time ")); 133 if (sec < 0 && usec != 0) { 134 sec++; 135 if (sec == 0) 136 ND_PRINT((ndo, "-")); 137 usec = 1000000 - usec; 138 } 139 ND_PRINT((ndo, "%ld.%06ld", sec, usec)); 140 break; 141 } 142 ND_TCHECK(tsp->tsp_name); 143 ND_PRINT((ndo, " name ")); 144 if (fn_print(ndo, (const u_char *)tsp->tsp_name, (const u_char *)tsp->tsp_name + sizeof(tsp->tsp_name))) 145 goto trunc; 146 return; 147 148 trunc: 149 ND_PRINT((ndo, " %s", tstr)); 150 } 151